Dec. 1993 Gregory Ledbetter is hired by Cary Home for Children in Lafayette, Ind.
Jan. 1996 Ledbetter is charged with 43 counts of child seduction based on allegations from group home boys.
Jan. 1997 Indiana prosecutors drop charges after one accuser recants.
March 31, 1998 Spring House opens at 511 S. Ingersoll St.
April 20, 1998 Ledbetter begins work at Spring House.
Feb. 29, 2000 Ledbetter resigns from Walden Homes.
Nov. 2004 Angela Kalscheur begins work at Spring House.
June 27, 2005 Dane County officials learn of possible sexual misconduct by Kalscheur at Spring House. This is reported to the state two days later; authorities in Rock County are asked to investigate.
Oct. 15, 2005 Madison police arrest Ledbetter after a neighbor reports his sexual relationship with
Oct. 19, 2005 Ledbetter is charged with one count of sexual exploitation of a child. Two weeks later, 82 new charges are added after police review videotapes of his sexual encounters.
Feb. 1, 2006 Walden Homes is fined $1,000 by the state after Rock County's investigation substantiates abuse in the Kalscheur case.
Feb. 23, 2006 Ledbetter charged with seven more sex crimes, bringing total charges to 92, after additional victims are identified.
May 25, 2006 Kalscheur confesses to a detective that she had sexual contact with several boys at Spring House.
June 30, 2006 Spring House closes, for financial reasons.
July 18, 2006 Ledbetter is sentenced to 100 years in prison and 85 years of extended supervision after pleading guilty to 28 charges.
Sept. 19, 2006 Kalscheur is charged with 10 counts of child sexual assault.
Nov. 10, 2006 Ledbetter's sentence is amended; his new sentence makes him eligible for parole after 90 years.
Jan. 2007 Dane County's Health and Human Needs Committee chair launches an investigation into Walden Homes after being contacted by Isthmus.